util: add smmstoretool for editing SMMSTORE

Offline SMMSTORE variable modification tool.  Can be used to
pre-configure ROM image or debug EFI state stored in a dump.

Change-Id: I6c1c06f1d0c39c13b5be76a3070f09b715aca6e0
Signed-off-by: Sergii Dmytruk <sergii.dmytruk@3mdeb.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/79080
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>

util/smmstoretool/data.h

@@ -0,0 +1,26 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef SMMSTORETOOL__DATA_H__
+#define SMMSTORETOOL__DATA_H__
+
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+
+enum data_type {
+	DATA_TYPE_BOOL,
+	DATA_TYPE_UINT8,
+	DATA_TYPE_UINT16,
+	DATA_TYPE_UINT32,
+	DATA_TYPE_ASCII,
+	DATA_TYPE_UNICODE,
+	DATA_TYPE_RAW,
+};
+
+void print_data(const uint8_t data[], size_t data_size, enum data_type type);
+
+void *make_data(const char source[], size_t *data_size, enum data_type type);
+
+bool parse_data_type(const char str[], enum data_type *type);
+
+#endif // SMMSTORETOOL__DATA_H__